.TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourIsothermalCompressibility_psxi .TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourIsothermalCompressibility_psxipartial function vapourIsothermalCompressibility_psxi = TILMedia.BaseClasses.PartialVLEFluidObjectFunctionPrototypes.vapourIsothermalCompressibility_psxi;